Electrically-actuated sawmill set-works.



N0. OO0,045. Patented Oct. l6, I900. W. M. CARROLL.

ELECTRICALLY AOTUATED SAWMILL SET WORKS.

(Application filed May 12,;1966.

(No Model.)

3 Sheets-Sheet l.

film

No. 660,045. Patented Oct. l6, I900. W. M. CARROLL.

ELECTBICALLY ACTUATED SAWMILL SET WORKS.

(Application, filed may 12, 1900,) (N M0 181.) 3 Sheets-Sheet 2.

No. HEELMS. I Patented Oct. l6, I900. W. WI. CARROLL;

ELECTRIGALLY AGTUATED SAWMILL SET WORKS.

(Application filed May 12, 1900.) (No Model.)

3 Sheets-Sheet 3.

507 2 4 l au ior w m Q Mam e ATFNT rricn.

ELECTRlCALLY-ACTUATED SAWlVllLL SlE'l'- WORKS.

SPECIFICATION forming part of Letters Patent N 0. 660,045, dated October16, 1900.

Application filed May 12, 1900.

T0 ml], whom it may concern.-

Beitknown that I, WILLIAM M. CARROLL, a citizen of the United States,residing at Beaumont, in the county of Jefferson and State of Texas,have invented a new and useful Electrically Actuated Sawmill Set WVorks,of which the following is a specification.

My invention is an improved electricallyactuated sawmill set-works, oneobject of my invention being to combine with the set-works anelectromagnetic clutch forming a stop on the set-shaft and means toregulate the rotation of said clutch-stop and set-shaft, and therebypredetermine the extent of the move ment of the knees.

Another object of my invention is to combine with the set-works theelectromagnetic clutch stop and the electrically actuated mechanism forthe set-works, means to break the electric circuit when the knees havebeen moved to the required adjustment, and thereby cut out theactuating-motor and simultaneously stop the rotation of the set-shaft.

My invention consists in the peculiar construction and combination ofdevices hereinafter fully set forth, and pointed out in the claims.

In the accompanying drawings, Figure 1 is a top plan view of asawmill-carriage provided with electrically-actuatedsetworks constructedin accordance with my invention. Fig. 2 is a vertical longitudinalsectional view of the same. Fig. 3 is a top plan view of my im-. provedset-works, the electric circuits being indicated diagrammatically. Fig.at is a detail sectional view taken on the line 4: 4 of Fig. 8. Fig. 5is a similar view taken on the line 5 5 of Fig. 3. Fig. 6 is adetailsectional view of the electromagnetic clutch. Fig. '7 is a detailview of the circuitbreaker. Fig. 8 is a top plan view o'f a modifiedform of my improved sawmill set-works.

The carriage A, head-blocks O, knees B, adjustable thereon, andset-shaft D, geared to the knees to actuate the same, are of theusualconstructiomwellknown to those skilled in the art to which thisinvention relates.

In the embodiment of my invention I provide an electromagnetic clutch10, one memberof which,1l,is keyed orotherwise firmly secured to theset-shaft and revoluble therewith and is adapted to be magnetizedelectrically Serial No- 16,500. kllo model.)

by the passage of an electric current through a winding, as will beunderstood, a suitable form of the device being illustrated in Fig. 6

of the drawings; but the same may be varied without departing from thespirit of my invention. The member 12 of the clutclnwhich constitutesthe armature, is in the form of a disk, which is loose on the shaft, iscircular in form, and is provided on its upper side with a pair ofradially-projectingstops 13 14. A base or supporting plate 15 hassuitable bearings 16 for the set-shaft D, and a coiled spring 17 islocated loosely on the set-shaft. One end of the said spring is securedto the member 12, as at 18 or in any other suitable manner, and theother end of the spring bears against one of the bearings 16, the springserving to move the member 12 in one direction, as hereinafterdescribed, an entire revolution of the set-shaft. The said member 12will be hereinafter referred to as the clutch-stop.

An arch-bar 19 is disposed transversely on the plate 15, extends fromone side to the other thereof, is secured thereto either by bolts, ashere shown at 20, or by other suit able means, and said arch-bar passesover and is concentric with the electromagnetic member 11 of the clutch.The said arch-bar is provided with a series of opening. 21, the spacesbetween the centers of which represent units of measure, as inches, andin the said openings are stop-pins 22, which are adapted to be movedlengthwise in said openings and to be extended from the side of thearch-bar on which the clutch-stop is located in the path of the engagingstop or shoulder 13 thereof. The spring 17 keeps the stop or shoulder 13normally in engagement with one of the pins 22.

A make and break 23, which forms the ter minals of an electric circuit,including an electric source, as a dynamo and a motor 29, has a button24, which is disposed in the path of the stop or shoulder 14 of theclutch-stop l2, and it will be understood that when the set-shaft isturned in the direction indicated by the arrow in Fig. 4 to adjust theknees on the headblock the said button 24 is engaged by the stopshoulder1a of the clutch-stop, thereby breaking the electric circuit to out outthe motor and stop the rotation of the setshaft by coming in contactwith the plate, and hence limiting the movement of the knees.

It will be understood that prior to the move ment of the clutch-stop 12with the shaft D in the direction indicated by the arrow in Fig. 4 theclutch member 11 is magnetized by closing the electric circuit, as bymeans of'a switch, (indicated at a in Figs. 1 and 3,) the magnetizedmember 11 turning with the setshaft D and the clutch-stop 12, which, asbefore stated, constitutes the armature, turning with said magnetizedmember by the attraction of the latter, as will be understood. By meansof the pins 22 the throw of the clutch-stop 12 may be regulated, andhence at each operation of the set-shaft and setworks the adjustment ofthe knees on the head-blocks may be predetermined, as may be required,the spring 17 returning the cl utchstop to its initial position when theclutch member 11 is demagnetized by breaking the circuit controlled byswitch a, the rearward throw of the clutch-stop being limited by anappropriate regulating-pin 22, which is eX- tended into the path of andbecomes engaged by the stop-shoulder 13.

I will now describe means for rota-ting the set-shaft in order to adjustthe knees-on the head-blocks.

A worm-gear 25 is fast on the set-shaft and is engaged by a worm 26,which is included in a shaft 27, the bearings 28 of which are mounted onthe plate 15. The shaft 27 is revolved by an electric motor, (indicateddiagrammatically at 29,) which should preferably derive its current fromthe same electric source as that which supplies current to the windingsof the electromagnet clutch member 11. A suitable reversiblemotor-controller, (indicated diagrammatically at 30,) is included inelectric circuit with the motor 29, by means of which the latter may bespeeded and driven in either direction, as may be required. This motorbeing geared to the shaft D, as hereinbefore described, communicatespower to tITeBet-worlgs, as will be understood.

In Fig. 8 I show a modification of my invention in which the shaft 27 isprovided with a friction-cone 31, which may be engaged by either of apair of reversely-arranged frictioncones 32 33 on alongitudinally-movable shaft 34, geared to the set-shaft D by gears 3536, said longitudinally-movable shaft 34 being provided with ashiftinglever, as at 37. The shaft 27 is rotated continuously by an electricmotor. The set-shaft may be caused to rotate in either direction as maybe required to adjust the knees by causing the cone 31 to be engagedeither by the cone 32 or the cone 33, and when said cone 31 is inengagement with neither of said cones 32 33 the setshaft is at rest.

Having thus described my invention, I claim- 1. The combination withsawmill set-works, having a set-shaft and means to actuate the same, ofan electromagnetic clutch havingone member fast on said shaft and onemember loose thereon, means for magnetizing said clutch and thuscarrying the loose member therewith, means for demagnetizing the clutch,means to move said loose member in one direction independently of saidset-shaft when the clutch is demagnetized, means to arrest the movementof said loose member with the shaft, and means to predetermine theextent of the rotary movement of said loose member, substantially asdescribed.

' 2. Thecombination withsawmillset-works, having a set-shaft and meansto actuate the same, of an electromagnetic clutch having one member faston the set-shaft, the other member affected by the electromagneticaction, being loose on said shaft, engaging devices forming, with saidloose member, a stop to limit the rotation of said set-shaft, means tomove said loose member independently of said set-shaft in one directionwhen the clutch is demagnetized and means to predetermine the extent ofthe rotary movement of said loose member, substantially as described.

3. The combination with sawmill set-works having a set-shaft, and meansto actuate the same, of an electromagnetic clutch member fast on saidshaft, a clutch member loose on said' shaft, forming an armature, andengaging device's forming, with said loose member, a stop to limit therotation of the set-shaft in one direction, a spring to move said looseclutch member in one direction independently of the set shaft when theelectromagnetic clutch member is demagnetized, means to arrest themovement of the loose member with the shaft and means to limit andpredetermine the extent of the rotary movement of said loosemember,substantially as described.

4. The combination with sawmill set-works, having a set-shaft, and meansto actuate the same of an electromagnetic clutch member fast on saidshaft, a clutch member loose on said shaft, forming an armature,engaging devices forming, with said loose member, a stop to limit therotation of the set-shaft in one direction, a spring to move said looseclutch member in one direction independently of the set-shaft when theelectromagnetic clutch member is demagnetized means to arrest the rotarymovement of said loose mem ber with said shaft and electromagneticmember when the latter is magnetized and to predetermine the range ofmovement of said loose member, and a make and break operable by saidloose clutch member at one limit of the rotary movement thereof, tobreak the electric circuit, substantially as described.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in the presence of two witnesses.

WILLIAM M. CARROLL.

Witnesses:

J. W. GARNER, MAY 0. GLADMOND.

